Consider the diagram. Which postulate of the kinetic-molecular theory best describes the event in the diagram?
O Most of the volume of a gas is empty space.
O All collisions between particles are perfectly elastic.
O There is no force of attraction or repulsion between gas particles.
O The average kinetic energy of particles depends only on temperature.

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.

level 4 to level 2 : ))